CN105814585A - Fingerprint processing method, fingerprint processing device, fingerprint identification system and electronic equipment - Google Patents

Abstract

The invention discloses a fingerprint processing method of a fingerprint identification system. The fingerprint identification system includes the push type fingerprint sensor, the push type fingerprint sensor includes sensing electrode array. When the fingerprint identification system works in a fingerprint registration mode, the fingerprint processing method comprises the following steps: when a finger of a user slides over the sensing electrode array, acquiring a plurality of fingerprint images scanned by the pressing type fingerprint sensor; screening the acquired multiple fingerprint images; extracting the characteristic value of the screened fingerprint image; removing one group of the same characteristic values of the two screened adjacent fingerprint images; and storing the characteristic value of the fingerprint image after the elimination processing into the registration template. The invention also discloses a fingerprint processing device, a fingerprint identification system and electronic equipment.

Description

Fingerprint processing method, fingerprint processing device, fingerprint identification system and electronic equipment

technical field

The invention relates to the technical field of fingerprint sensing, in particular to a fingerprint processing method, a fingerprint processing device, a fingerprint identification system, and electronic equipment with the fingerprint identification system.

Background technique

With the development of security technology, fingerprint recognition has gradually gained everyone's attention, and its application fields are becoming wider and wider. At present, the fingerprint identification system of the electronic device requires the user to first register the fingerprint to form a fingerprint template. After the fingerprint registration is successful, when the user uses the fingerprint to unlock, the fingerprint identification system scans the fingerprint currently entered by the user and compares it with the previously registered fingerprint template for confirmation. When the comparison is successful, the fingerprint is unlocked successfully, otherwise the fingerprint is unlocked fail.

At present, the fingerprint identification system of electronic equipment usually uses a push-type fingerprint sensor. For example, mobile terminals such as iPhone5s, iPhone6, and iPhone6s of Apple in the United States use a push-type fingerprint sensor. Each touch operation on the push-type fingerprint sensor only obtains one fingerprint image. After the user needs more than a dozen or even twenty touch operations, the fingerprint recognition system can obtain enough fingerprint images to stitch together into subsequent fingerprint verification. Required fingerprint template. Such a registration process needs to spend a lot of time for the user to register the fingerprint, therefore, the electronic device with the fingerprint identification system is not humanized enough.

Contents of the invention

In order to solve the above technical problems, the present invention provides a fingerprint processing method, a fingerprint processing device, a fingerprint identification system, and an electronic device with short fingerprint registration time.

To achieve the above object, the present invention provides the following technical solutions:

A fingerprint processing method of a fingerprint recognition system, the fingerprint recognition system includes a push-type fingerprint sensor, the push-type fingerprint sensor includes a sensing electrode array, when the fingerprint recognition system works in a fingerprint registration mode, the fingerprint processing method includes :

When the user's finger slides over the sensing electrode array, multiple fingerprint images scanned by the push-type fingerprint sensor are obtained;

Screening the acquired multiple fingerprint images;

Extract the feature value of the screened fingerprint image;

Eliminate a group of identical eigenvalues of the two adjacent fingerprint images after screening;

Store the eigenvalues of the removed fingerprint image into the registration template.

Optionally, screening the fingerprint image includes:

Calculate the sliding distance of the user's finger on the push-type fingerprint sensor according to the obtained multiple fingerprint images, and screen the fingerprint images according to the sliding distance; or

Screening of fingerprint images based on the time a finger is swiped across the press-type fingerprint sensor; or

Screening of fingerprint images based on the distance and time the finger slides on the press-type fingerprint sensor; or

The fingerprint images are screened according to the overlapped area of the acquired adjacent fingerprint images.

Optionally, when the fingerprint identification system works in the fingerprint registration mode, the fingerprint processing method further includes:

The fingerprint is scanned by the push-type fingerprint sensor, and the user is prompted to slide the finger after it is judged that the user's finger is placed on the sensing electrode array according to the scanned fingerprint.

Optionally, when the fingerprint identification system works in the fingerprint registration mode, the fingerprint processing method further includes:

Scan the fingerprint through the push-type fingerprint sensor, when it is judged according to the scanned fingerprint that the finger is placed on the sensing electrode array, and the area covered by the finger on the push-type fingerprint sensor is not less than the area of the push-type fingerprint sensor After a predetermined percentage of , the user is prompted to swipe their finger.

Optionally, the predetermined percentage is 50%.

Optionally, when the fingerprint identification system works in the fingerprint registration mode, the fingerprint processing method further includes:

Judging whether the amount of information in the filtered fingerprint image is sufficient, if it is sufficient, it will prompt that the registration is successful, otherwise it will prompt to continue to register or re-register;

Wherein, the amount of information includes whether the number of screened fingerprint images is greater than a predetermined number or/and whether the area of the fingerprint image obtained after splicing the screened fingerprint images is greater than a predetermined area.

Optionally, when the fingerprint identification system works in the fingerprint verification mode, the fingerprint processing method includes:

When a user's finger touches or presses the push-type fingerprint sensor, acquiring a fingerprint image scanned by the push-type fingerprint sensor; and

When the fingerprint image or the characteristic value of the fingerprint image obtained in the verification mode meets the predetermined condition compared with the fingerprint image or the characteristic value of the fingerprint image in the registration template, it is confirmed that the identity verification is passed, otherwise it is confirmed that the identity verification fails.

Optionally, in the registration mode, when the user's finger slides over the sensing electrode array, multiple fingerprint images scanned by all or part of the scanning area on the push-type fingerprint sensor are acquired.

Optionally, in the registration mode, the screened fingerprint images include multiple, and the screened multiple fingerprint images have partial overlap between adjacent fingerprint images, or, the screened multiple fingerprint images Whether there is overlap between adjacent fingerprint images, or, among the multiple screened fingerprint images, there is overlap between some adjacent fingerprint images, and there is no overlap between some adjacent fingerprint images.

A fingerprint processing device of a fingerprint recognition system, the fingerprint recognition system includes a push-type fingerprint sensor, the push-type fingerprint sensor includes a sensing electrode array, the fingerprint processing device includes an acquisition module, a processing module, and a storage module, the The processing module includes a first sub-processing module, a second sub-processing module, and a third sub-processing module. When the fingerprint identification system works in the fingerprint registration mode:

The acquisition module is used to acquire multiple fingerprint images scanned by the push-type fingerprint sensor when the user's finger slides over the sensing electrode array;

The first sub-processing module is used to screen the acquired multiple fingerprint images;

The second sub-processing module is used to extract feature values of a plurality of feature points of the screened fingerprint image; and

The third sub-processing module is used to eliminate a group of identical feature values of the two adjacent fingerprint images after screening; and

The storage module is used to store the feature values of the fingerprint image after being eliminated by the third sub-processing module into the registration template.

Optionally, the first sub-processing module is based on:

The obtained multiple fingerprint images calculate the sliding distance of the user's finger on the push-type fingerprint sensor, and screen the fingerprint images according to the sliding distance; or

The time a finger is swiped across the press-type fingerprint sensor to screen the fingerprint image; or

Screening of fingerprint images by the distance and time of finger sliding on the push-type fingerprint sensor; or

The overlapping area of the obtained adjacent fingerprint images is obtained to screen the fingerprint images.

Optionally, the fingerprint processing device further includes a prompting module. When the fingerprint recognition system works in the fingerprint registration mode, the fingerprint is scanned by the push-type fingerprint sensor. After sensing the electrode array, the prompt module is used to prompt the user to slide the finger.

Optionally, the fingerprint processing device further includes a prompting module. When the fingerprint recognition system works in the fingerprint registration mode, the fingerprint is scanned by the push-type fingerprint sensor. After judging that the user's finger is placed on the sensing electrode array and the area covered by the finger on the push-type fingerprint sensor is not less than a predetermined percentage of the area of the push-type fingerprint sensor, the prompt module prompts the user to slide the finger.

Optionally, the predetermined percentage is 50%.

Optionally, the processing module further includes a fourth sub-processing module. When the fingerprint recognition system is working in the fingerprint registration mode, the fourth sub-processing module is used to judge whether the amount of information of the screened fingerprint image is sufficient, and if it is sufficient , the prompt module prompts the user to register successfully, otherwise, the prompt module prompts the user to continue to register or re-register;

Wherein, the amount of information includes whether the number of screened fingerprint images is greater than a predetermined number or/and whether the area of the fingerprint image obtained after splicing the screened fingerprint images is greater than a predetermined area.

Optionally, in verify mode:

The acquiring module is further used to acquire a fingerprint image scanned by the pressing fingerprint sensor when the user's finger touches or presses the pressing fingerprint sensor;

The processing module is used to correspondingly compare the fingerprint image or the feature value of the fingerprint image obtained in the verification mode with the fingerprint image or the feature value of the fingerprint image in the registration template to meet the predetermined condition, and if so, confirm that the identity verification is passed , otherwise, confirm authentication failed.

Optionally, in the registration mode, when the user's finger slides over the sensing electrode array, the acquisition module acquires multiple fingerprint images scanned by all or part of the scanning area on the push-type fingerprint sensor.

Optionally, in the registration mode, the fingerprint images screened by the processing module include multiple fingerprint images, and there is partial overlap between adjacent fingerprint images in the multiple screened fingerprint images, or, the screened multiple fingerprint images Whether there is overlap between adjacent fingerprint images in the fingerprint images, or, among the multiple screened fingerprint images, there is overlap between some adjacent fingerprint images, and there is no overlap between some adjacent fingerprint images.

A fingerprint identification system, comprising:

A push-type fingerprint sensor, including a sensing electrode array, the push-type fingerprint sensor is used for:

In the enrollment mode, performing fingerprint scanning when the user's finger slides over the sensing electrode array, so that the fingerprint processing device acquires a plurality of fingerprint images; and

In the authentication mode, performing fingerprint scanning when the user's finger touches or presses on the sensing electrode array, so that the fingerprint processing device acquires a fingerprint image; and

The fingerprint processing device is the fingerprint processing device described in any one of the above.

An electronic device includes the above-mentioned fingerprint identification system.

Since the fingerprint processing method, fingerprint processing device, fingerprint identification system, and electronic device of the present application acquire multiple fingerprint images when the user slides over the sensing electrode array of the push-type fingerprint sensor, that is, the method of sliding on the push-type fingerprint sensor is adopted. Multiple fingerprint images are acquired instead of one fingerprint image as in the prior art, so the user spends less time in the process of fingerprint registration.

While a number of embodiments are disclosed, including variations thereof, still other embodiments of the present disclosure will become apparent to those skilled in the art from the following detailed description which shows and describes illustrative embodiments of the present disclosure. It will be realized that the present disclosure is capable of modification in various obvious respects, all without departing from the spirit and scope of the invention. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive.

Description of drawings

The features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of an embodiment of the fingerprint identification system of the present invention.

Fig. 2 is a schematic structural diagram of the electronic device of the present invention.

FIG. 3 is a flow chart of the fingerprint processing method when the fingerprint identification system of the present invention works in the fingerprint registration mode.

Fig. 4 is a flow chart of the fingerprint processing method when the fingerprint identification system of the present invention works in the fingerprint verification mode.

detailed description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Furthermore, the described features and structures may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, those skilled in the art will appreciate that the technical solutions of the present invention may be practiced without one or more of the specific details, or with other structures, components, and the like. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.

Further, in the description of the present invention, it should be understood that: "multiple sheets" includes two or more than two sheets, unless otherwise specifically defined in the present invention. In addition, words such as "first" and "second" appearing in the names of the components do not limit the order in which the components appear, but are for the convenience of naming the components, clearly distinguishing the components, and making the description more concise.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of the fingerprint identification system of the present invention. The fingerprint recognition system 100 includes a push-type fingerprint sensor 10 and a fingerprint processing device 20 . The push-type fingerprint sensor 10 is connected with the fingerprint processing device 20 .

The fingerprint identification system 100 is used to perform fingerprint sensing, and it mainly includes three working modes, namely fingerprint registration mode, fingerprint verification mode, and fingerprint cancellation mode, these three working modes can also be referred to as registration mode and verification mode for short. , and logout mode. Wherein, the fingerprint registration mode is used to add a new user's fingerprint, and store the collected fingerprint image or feature value of the fingerprint image into a registration template or a fingerprint database. The fingerprint verification mode matches the user's fingerprint image or the feature value of the fingerprint image with the corresponding stored fingerprint image or feature value of the fingerprint image in the fingerprint database, thereby verifying whether the user's fingerprint is a registered fingerprint. The fingerprint deregistration mode is used to delete the registered fingerprint image or the feature value of the fingerprint image from the fingerprint database.

The push-type fingerprint sensor 10 includes a sensing electrode array 11 . The sensing electrode array 11 includes a plurality of electrodes 111 . The plurality of sensing electrodes 111 are used for receiving user's fingerprint input. The push-type fingerprint sensor 10 is, for example, a capacitive fingerprint sensor, an optical fingerprint sensor, an ultrasonic fingerprint sensor and the like. Taking a capacitive fingerprint sensor as an example, the plurality of sensing electrodes 111 are used to form capacitances with the ridges and valleys of the user's fingerprint respectively, and the capacitances formed between the ridges, valleys and the sensing electrodes 111 are different, and the capacitances The corresponding fingerprint sensor scans to obtain the fingerprint image. The working principles of optical fingerprint sensors, ultrasonic fingerprint sensors and other fingerprint sensors with sensing electrode arrays will not be repeated here.

In the enrollment mode, the push-type fingerprint sensor 10 is used to scan the fingerprint of a finger sliding over the sensing electrode array 11, so that the fingerprint processing device 20 acquires multiple fingerprint pictures. In the registration mode, the area where the sensing electrode array 11 is located is a scanning area. However, alternatively, in other implementation manners, part of the area where the sensing electrode array 11 is located may also be a scanning area.

In the verification mode, the push-type fingerprint sensor 10 is used to scan the fingerprint of a finger touched or pressed on the sensing electrode array 11, so that the fingerprint processing device 20 acquires a fingerprint image for verification. In the verification mode, the push-type fingerprint sensor 10 captures a fingerprint image for each touch or press of the user's finger. Wherein, the touch includes, for example, a sliding operation.

The fingerprint processing device 20 includes an acquisition module 21 , a processing module 23 , and a storage module 25 . In the registration mode, the acquiring module 21 is configured to acquire multiple fingerprint images scanned by the push-type fingerprint sensor 10 when the user's finger slides over the sensing electrode array 11 . The processing module 23 includes a first sub-processing module 230 , a second sub-processing module 231 , and a third sub-processing module 232 . The first sub-processing module 230 is used for screening the acquired multiple fingerprint images. The second sub-processing module 231 is used to extract feature values of multiple feature points of the screened fingerprint image. The third sub-processing module 232 is used to eliminate a group of identical feature values of the filtered two adjacent fingerprint images. The storage module 25 is used to store the feature values of the fingerprint image after being eliminated by the third sub-processing module 232 into the registration template.

Compared with the way in which the push-type fingerprint sensor collects one fingerprint image at a time in the prior art, the fingerprint recognition system 100 of the present application can obtain multiple fingerprint images at one time by adopting a sliding-type fingerprint collection method on the push-type fingerprint sensor 10 , so that the fingerprint registration can be completed by one or several swipes, thereby reducing the registration time.

Further, the fingerprint processing device 20 screens the acquired multiple fingerprint images, extracts the feature values of the multiple feature points of the screened fingerprint images, and removes the same feature values of the screened two adjacent fingerprint images. and store the feature values of the fingerprint image after the elimination processing by the third sub-processing module 232 into the registration template. The registration steps are also relatively simple, thereby further shortening the fingerprint registration time.

In this embodiment, when the filtered adjacent fingerprint images overlap, a group of the same feature values in the overlapping area of the adjacent fingerprint images is eliminated.

The fingerprint images screened by the processing module 23 include multiple fingerprint images, for example. Of course, the fingerprint image screened by the processing module 23 can also be one.

For example, among the multiple screened fingerprint images, adjacent fingerprint images partially overlap each other. Of course, there may be no overlap between adjacent fingerprint images. Part of the fingerprint images may overlap between adjacent fingerprint images, and there may be no overlap between part of the fingerprint images.

The first processing submodule 230 is based on:

The acquired multiple fingerprint images calculate the sliding distance of the user's finger on the push-type fingerprint sensor 10, and screen the fingerprint images according to the sliding distance; or

The time when the finger slides on the push-type fingerprint sensor 10 is used to screen the fingerprint image; or

The distance and the time of sliding of the finger on the push-type fingerprint sensor 10 are used to screen the fingerprint image; or

The overlapping area of the obtained adjacent fingerprint images is obtained to screen the fingerprint images.

The fingerprint images are screened according to the distance the finger slides on the push-type fingerprint sensor 10 , for example, one fingerprint image can be screened out at predetermined intervals.

Screening of fingerprint images is performed according to the time when the finger slides on the pressing fingerprint sensor 10 , for example, a fingerprint image can be screened out every predetermined time interval.

Screening of fingerprint images is carried out according to the distance and time of sliding of the finger on the push-type fingerprint sensor 10. Since the distance and the time of sliding of the finger on the push-type fingerprint sensor 10 are known, it can be determined that the finger is on the push-type fingerprint sensor 10. 10, therefore, the fingerprint image can be selected and screened according to the speed of the user's sliding.

Filter the fingerprint images according to the overlapping area of the obtained adjacent fingerprint images, for example, the first fingerprint image overlaps the second fingerprint image, the second fingerprint image overlaps the third fingerprint image, when the first The overlapping area of the first fingerprint image and the second fingerprint image is greater than the overlapping area of the first fingerprint image and the third fingerprint image, and when the overlapping areas exceed a predetermined value, the second fingerprint image is discarded. Here is just an example, and the present application does not have any special limitation on the overlapping area of fingerprint images and the number of discarded sheets, which can be set according to different situations such as product brands.

Please refer to FIG. 1 again, the fingerprint processing device 20 may further include a prompt module 27 . The prompt module 27 is used to scan the fingerprint through the push-type fingerprint sensor 10 when entering the registration mode, when the push-type fingerprint sensor 10 judges that the user's finger is placed on the sensing electrode array according to the scanned fingerprint. After 11, the user is prompted to swipe their finger.

The push-type fingerprint sensor 10 may further include a scanning module 13 and a judging module 15 . The scanning module 13 , for example, provides scanning signals to the sensing electrodes 111 , drives the sensing electrodes 111 to perform fingerprint sensing, and obtains fingerprint information according to the sensing signals output by the sensing electrodes 111 . The judging module 15 judges whether the user's finger is placed on the sensing electrode array 11 according to the fingerprint scanned by the scanning module 13 . When it is judged that the user's finger is placed on the sensing electrode array 11, an output signal is given to the prompt module 27 to prompt the user to slide the finger; when it is judged that the user's finger is not placed on the sensing electrode array 11 , then no signal is output to the prompting module 27. In this embodiment, the judging module 15 is set in the push-type fingerprint sensor 10, however, in other embodiments, the judging module 15 can also be set in the fingerprint processing device 20 .

In a further change, in the registration mode, the fingerprint is scanned by the push-type fingerprint sensor 10. When it is judged according to the scanned fingerprint that the user's finger is placed on the sensing electrode array 11 and the finger covers the push-type After the area of the fingerprint sensor 10 is not less than a predetermined percentage of the area of the push-type fingerprint sensor 10, the prompt module 27 prompts the user to slide the finger. Correspondingly, the judging module 15 is not only used to judge whether the user's finger is placed on the sensing electrode array 11, but also used to judge whether the area covered by the user's finger on the push-type fingerprint sensor 10 is not smaller than the push-type fingerprint sensor 10. A predetermined percentage of the area of the sensor 10 .

The percentage is, for example, a numerical value in the range of 40% to 100%, specifically 50%, of course, it can also be set to 40%, or 60% or other appropriate percentages according to requirements.

Optionally, the processing module 23 further includes a fourth sub-processing module 231 . The fourth sub-processing module 231 is used to judge whether the information amount of the screened fingerprint image is sufficient, if enough, the prompt module 27 will prompt the user to register successfully, otherwise, the prompt module 27 will prompt the user to continue registration or re-register. Wherein, the amount of information includes whether the number of screened fingerprint images is greater than a predetermined number or/and whether the area of the fingerprint image obtained after splicing the screened fingerprint images is greater than a predetermined area.

It should be noted that, in this embodiment, the processing module 23 first stores the screened fingerprint image in the storage module 25, and then judges whether the information amount of the screened fingerprint image is sufficient, and if it is enough, it is stored in the storage module. 25, otherwise, for example, the stored fingerprint image can be erased.

However, alternatively, in other embodiments, the processing module 23 can also first judge whether the information amount of the screened fingerprint image is sufficient, and if it is enough, then store the fingerprint image in the storage module, otherwise, discard the screened fingerprint image . In addition, the processing module 23 may also store the filtered fingerprint image while judging whether the information amount of the filtered fingerprint image is sufficient.

In the verification mode, the acquisition module 21 is also used for acquiring the fingerprint image scanned by the press-type fingerprint sensor 10 when the user's finger touches or presses the press-type fingerprint sensor 10 .

Said processing module 23 is also used for correspondingly comparing the fingerprint image or feature value of fingerprint image obtained in said verification mode with the fingerprint image or feature value of fingerprint image stored in the registration template stored by storage module 25, whether it satisfies a predetermined condition, If it is satisfied, it is confirmed that the identity verification is passed; otherwise, it is confirmed that the identity verification fails.

The fingerprint identification system 100 of the present application collects fingerprint images by sliding. Therefore, the user can complete fingerprint registration by sliding his finger on the push-type fingerprint sensor 10 once or several times, thereby shortening the fingerprint registration time. In addition, because the present application screens the acquired fingerprint images when registering the fingerprint template, and stores the screened fingerprint images or the feature values of the fingerprint images in the registration template, thereby further shortening the fingerprint registration time and making the fingerprint recognition system 100 more efficient. Humanize.

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of an embodiment of the electronic device of the present invention. The electronic device 1 is, for example, a portable electronic product or a household electronic product. Among them, portable electronic products are various mobile terminals, such as mobile phones, tablet computers, notebook computers, and wearable products; household electronic products are smart door locks, TVs, refrigerators, desktop computers, etc. And other electronic products. In this embodiment, the electronic device 1 is described by taking a mobile phone as an example. However, as can be seen from the foregoing, the electronic device 1 is not limited to a mobile phone. When it is other suitable electronic devices, or even if it is a mobile phone 2, the location of the fingerprint recognition system 100 is not limited to the location shown in FIG. , side and so on.

The electronic device 1 includes the fingerprint identification system 100 . The fingerprint identification system 100 is used for executing fingerprint sensing, and the electronic device 1 correspondingly controls whether to execute a corresponding function according to the fingerprint information sensed by the fingerprint identification system 100 . The corresponding functions include, for example, unlocking the screen, making payment, starting an application program (eg, WeChat, etc.), logging in to a folder, and the like.

Please refer to FIG. 3 . FIG. 3 is a flow chart of the fingerprint processing method when the fingerprint recognition system of the present invention works in the fingerprint registration mode. The fingerprint identification system is, for example, the fingerprint identification system 100 shown in FIG. 1 . When the fingerprint recognition system 100 works in the fingerprint registration mode, the fingerprint processing method includes:

Step S102: When the user's finger slides over the sensing electrode array 11, acquire multiple fingerprint images scanned by the push-type fingerprint sensor 10;

Step S103: Screening the acquired multiple fingerprint images;

Step S104: extracting feature values of the screened fingerprint image;

Step S105: Eliminate a group of identical feature values of the two adjacent fingerprint images after screening; and

Step S106: Store the feature values of the fingerprint image after elimination into the registration template.

In step S103, the obtained multiple fingerprint images are screened, including:

Calculate the sliding distance of the user's finger on the push-type fingerprint sensor 10 according to the obtained multiple fingerprint images, and screen the fingerprint images according to the sliding distance; or

Carry out screening of fingerprint images according to the time when the finger slides on the push-type fingerprint sensor 10; or

Carry out the screening of fingerprint image according to the distance that finger slides on the push-type fingerprint sensor 10 and the time of sliding; or

The fingerprint images are screened according to the overlapped area of the acquired adjacent fingerprint images.

The fingerprint images are screened according to the distance the finger slides on the push-type fingerprint sensor 10 , for example, one fingerprint image can be screened out at predetermined intervals.

Screening of fingerprint images is performed according to the time when the finger slides on the pressing fingerprint sensor 10 , for example, a fingerprint image can be screened out every predetermined time interval.

Screening of fingerprint images is carried out according to the distance and time of sliding of the finger on the push-type fingerprint sensor 10. Since the distance and the time of sliding of the finger on the push-type fingerprint sensor 10 are known, it can be determined that the finger is on the push-type fingerprint sensor 10. 10, therefore, the fingerprint image can be selected and screened according to the speed of the user's sliding.

Filter the fingerprint images according to the overlapping area of the obtained adjacent fingerprint images, for example, the first fingerprint image overlaps the second fingerprint image, the second fingerprint image overlaps the third fingerprint image, when the first The overlapping area of the first fingerprint image and the second fingerprint image is greater than the overlapping area of the first fingerprint image and the third fingerprint image, and when the overlapping areas exceed a predetermined value, the second fingerprint image is discarded. Here is just an example, and the present application does not have any special limitation on the overlapping area of fingerprint images and the number of discarded sheets, which can be set according to different situations such as product brands.

When the fingerprint identification system 100 works in the fingerprint registration mode, the fingerprint processing method may further include, for example:

Step S101 : scan the fingerprint by the push-type fingerprint sensor 10 , and prompt the user to slide the finger after judging that the user's finger is placed on the sensing electrode array 11 according to the scanned fingerprint.

However, alternatively, for step S101, it may also be:

Scan the fingerprint through the push-type fingerprint sensor 10, when it is judged according to the scanned fingerprint that the finger is placed on the sensing electrode array 11, and the area covered by the finger on the push-type fingerprint sensor 10 is not smaller than the push-type fingerprint After a predetermined percentage of the area of the sensor 10, the user is prompted to slide the finger.

The percentage is, for example, a numerical value in the range of 40% to 100%, specifically 50%, of course, it can also be set to 40%, or 60% or other appropriate percentages according to requirements.

Further, for step S105, when the filtered adjacent fingerprint images overlap, a group of the same feature values in the overlapping area of the adjacent fingerprint images is eliminated.

When the fingerprint identification system 100 works in the fingerprint registration mode, the fingerprint processing method may further include:

Step S107: Judging whether the amount of information of the screened fingerprint image is sufficient, if it is enough, it prompts that the registration is successful, otherwise it prompts to continue registration or re-register.

Wherein, the amount of information includes whether the number of screened fingerprint images is greater than a predetermined number or/and whether the area of the fingerprint image obtained after splicing the screened fingerprint images is greater than a predetermined area.

It should be noted that, in this embodiment, the fingerprint processing method is to first store the screened fingerprint image in the registration template, and then judge whether the information amount of the screened fingerprint image is sufficient, and if it is enough, keep the The stored fingerprint image, otherwise, the stored fingerprint image can be erased, for example.

However, alternatively, in other embodiments, the fingerprint processing method can also first judge whether the information amount of the screened fingerprint image is sufficient, and if it is enough, then store the fingerprint image in the storage module, otherwise, discard the screened fingerprint image. fingerprint image. In addition, the fingerprint processing method may also store the filtered fingerprint image while judging whether the information amount of the filtered fingerprint image is sufficient.

In step S102, when the user's finger slides over the sensing electrode array, multiple fingerprint images scanned by all or part of the scanning area on the push-type fingerprint sensor 10 are acquired.

In step S103, the filtered fingerprint images include multiple fingerprint images, and the adjacent fingerprint images in the multiple filtered fingerprint images partially overlap, or the adjacent fingerprint images in the multiple filtered fingerprint images Whether there is overlap between the fingerprint images, or, among the multiple screened fingerprint images, there is overlap between some adjacent fingerprint images, and there is no overlap between some adjacent fingerprint images.

Please refer to FIG. 4 . FIG. 4 is a flow chart of the fingerprint processing method when the fingerprint identification system of the present invention works in the fingerprint verification mode. The fingerprint identification system is, for example, the fingerprint identification system 100 shown in FIG. 1 . The fingerprint processing method includes:

S201: Acquire a fingerprint image scanned by the push-type fingerprint sensor 10 when the user's finger touches or presses the push-type fingerprint sensor 10; and

S202: When the fingerprint image or the characteristic value of the fingerprint image obtained in the verification mode meets the predetermined condition compared with the fingerprint image or the characteristic value of the fingerprint image in the registration template, confirm that the identity verification is passed; otherwise, confirm that the identity verification fails.

When the fingerprint processing method is in the fingerprint registration mode, the fingerprint image is collected on the push-type fingerprint sensor 10 by a sliding method, thereby reducing the registration time. In addition, since the fingerprint processing method screens the acquired fingerprint images when registering the fingerprint template, and stores the screened fingerprint images or the feature values of the fingerprint images in the registration template, thereby further shortening the fingerprint registration time and making fingerprint identification The system 100 is more user-friendly.

It should be noted that, in other implementation manners, the order of the steps in the above-mentioned fingerprint processing method can also be adjusted accordingly, and in addition, some steps can also be omitted or other steps can be added.

While the present disclosure has been described with reference to various embodiments, it will be understood that these embodiments are illustrative and that the scope of the present invention is not limited thereto. Many variations, modifications, additions, and improvements are possible. More generally, embodiments disclosed in accordance with the present invention are described in the context of specific embodiments. Functions may be separated or combined in different ways or described using different terms in the course of various embodiments disclosed in the present invention. These and other changes, modifications, additions, and improvements may be within the scope of the present disclosure as defined by the following claims.

Claims (20)

1. the finger prints processing method of a fingerprint recognition system, described fingerprint recognition system includes pressing type fingerprint sensor, described pressing type fingerprint sensor includes sensor electrode array, and when fingerprint recognition system is operated in fingerprint register pattern, described finger prints processing method includes:

When the finger of user is out-of-date from sensor electrode array slip up, obtain multiple fingerprint images obtained by described pressing type fingerprint sensor scans；

Multiple fingerprint images described in acquiring are screened；

Extract the eigenvalue of the fingerprint image after screening；

In the same characteristic features value of two adjacent fingerprint images after rejecting screening one group；

Store the eigenvalue of the fingerprint image after rejecting processes in enrollment.

2. finger prints processing method according to claim 1, it is characterised in that: multiple fingerprint images described in acquiring are screened, including:

Calculate, according to multiple fingerprint images described in acquiring, the distance that the finger of user slides on pressing type fingerprint sensor, carry out the screening of fingerprint image according to the distance of described slip；Or

The time slided on pressing type fingerprint sensor according to finger carries out the screening of fingerprint image；Or

The distance slided on pressing type fingerprint sensor according to finger and the time of slip carry out the screening of fingerprint image；Or

The screening of fingerprint image is carried out according to the equitant area of adjacent fingerprint image acquired.

3. finger prints processing method according to claim 1, it is characterised in that: when fingerprint recognition system is operated in fingerprint register pattern, described finger prints processing method farther includes:

By described pressing type fingerprint sensor scans fingerprint, after judging that the finger of user is placed on described sensor electrode array according to the fingerprint situation scanned, user is pointed out to slide finger.

4. the finger prints processing method according to any one in claim 1-3, it is characterised in that: when fingerprint recognition system is operated in fingerprint register pattern, described finger prints processing method farther includes:

By described pressing type fingerprint sensor scans fingerprint, after judging that according to the fingerprint situation that scans finger is placed on described sensor electrode array and finger covers the predetermined percentage of area that the area of described pressing type fingerprint sensor is not less than described pressing type fingerprint sensor, user is pointed out to slide finger.

5. finger prints processing method according to claim 4, it is characterised in that: described predetermined percentage is 50%.

6. the finger prints processing method according to any one in claim 1-3, it is characterised in that: when fingerprint recognition system is operated in fingerprint register pattern, described finger prints processing method farther includes:

Judging that whether the quantity of information of the fingerprint image after screening is enough, if enough, prompting is succeeded in registration, and otherwise points out the renewal of registration or re-registers；

Wherein, described quantity of information include screening after fingerprint image number whether more than predetermined number or/and whether the fingerprint image after screening obtains the area of fingerprint image more than predetermined area after splicing.

7. finger prints processing method according to claim 1, it is characterised in that: when fingerprint recognition system is operated in fingerprint authentication pattern, described finger prints processing method includes:

When the finger of user touches or presses described pressing type fingerprint sensor, obtain the fingerprint image obtained by described pressing type fingerprint sensor scans；With

When under Validation Mode obtain fingerprint image or the eigenvalue of fingerprint image corresponding with the eigenvalue of the fingerprint image in enrollment or fingerprint image compared with meet predetermined condition time, then confirm authentication pass through, otherwise confirm authentication failure.

8. finger prints processing method according to claim 1, it is characterized in that: when registration mode, when the finger of user is out-of-date from sensor electrode array slip up, obtain and scanned, by all or part of scanning area on described pressing type fingerprint sensor, multiple fingerprint images obtained.

9. finger prints processing method according to claim 1, it is characterized in that: when registration mode, fingerprint image after screening includes multiple, overlap between fingerprint image adjacent in multiple fingerprint images after described screening, or, have non-overlapping between fingerprint image adjacent in multiple fingerprint images after described screening, or, overlap is had between the fingerprint image that in multiple fingerprint images after described screening, part is adjacent, non-overlapping between the fingerprint image that part is adjacent.

10. the finger prints processing device of a fingerprint recognition system, described fingerprint recognition system includes pressing type fingerprint sensor, described pressing type fingerprint sensor includes sensor electrode array, described finger prints processing device includes acquisition module, processing module and memory module, described processing module includes the first sub-processing module, the second sub-processing module and the 3rd sub-processing module, when fingerprint recognition system is operated in fingerprint register pattern:

Described acquisition module is for when the finger of user is out-of-date from sensor electrode array slip up, obtain multiple fingerprint images obtained by described pressing type fingerprint sensor scans；

Described first sub-processing module is for screening multiple fingerprint images described in acquiring；

Described second sub-processing module is used for the eigenvalue of multiple characteristic points of the fingerprint image after extracting screening；With

Described 3rd sub-processing module is for a group in the same characteristic features value of two adjacent fingerprint images after rejecting screening；With

Described memory module is used for the eigenvalue storing the fingerprint image after the 3rd sub-processing module rejecting processes in enrollment.

11. finger prints processing device according to claim 10, it is characterised in that: described processing module includes screening module, and described screening module is for screening acquired multiple fingerprint images obtained of acquisition module；Described screening module according to:

Multiple fingerprint images described acquired calculate the distance that the finger of user slides on pressing type fingerprint sensor, carry out the screening of fingerprint image according to the distance of described slip；Or

The time that finger slides on pressing type fingerprint sensor carries out the screening of fingerprint image；Or

The time of the distance that finger slides on pressing type fingerprint sensor and slip carries out the screening of fingerprint image；Or

The equitant area of adjacent fingerprint image acquired is to carry out the screening of fingerprint image.

12. finger prints processing device according to claim 10, it is characterized in that: described finger prints processing device farther includes reminding module, when fingerprint recognition system is operated in fingerprint register pattern, by described pressing type fingerprint sensor scans fingerprint, after judging that the finger of user is placed on described sensor electrode array according to the fingerprint situation that scans, described reminding module is used for pointing out user to slide finger.

13. the finger prints processing device according to any one in claim 10-12, it is characterized in that: described finger prints processing device farther includes reminding module, when fingerprint recognition system is operated in fingerprint register pattern, by described pressing type fingerprint sensor scans fingerprint, when according to the fingerprint situation scanned, pressing type fingerprint sensor or finger prints processing device judge that the finger of user is placed on described sensor electrode array, and finger covers after the area of described pressing type fingerprint sensor is not less than the predetermined percentage of area of described pressing type fingerprint sensor, described reminding module prompting user slide finger.

14. finger prints processing device according to claim 13, it is characterised in that: described predetermined percentage is 50%.

15. the finger prints processing device according to any one in claim 10-12, it is characterized in that: described processing module farther includes the 4th sub-processing module, when fingerprint recognition system is operated in fingerprint register pattern, whether described 4th sub-processing module is enough for the quantity of information judging the fingerprint image after screening, if enough, reminding module then points out user registration success, and otherwise, reminding module is then pointed out user's renewal of registration or re-registers；

Wherein, described quantity of information include screening after fingerprint image number whether more than predetermined number or/and whether the fingerprint image after screening obtains the area of fingerprint image more than predetermined area after splicing.

16. finger prints processing device according to claim 10, it is characterised in that: when fingerprint recognition system is operated in fingerprint authentication pattern:

Described acquisition module is further used for when the finger of user touches or presses described pressing type fingerprint sensor, obtains the fingerprint image obtained by described pressing type fingerprint sensor scans；

Described processing module is for whether the eigenvalue of eigenvalue and the fingerprint image in enrollment or fingerprint image that correspondence compares fingerprint image or the fingerprint image obtained under described Validation Mode meets predetermined condition, if meeting, then confirm that authentication is passed through, otherwise, confirm authentication failure.

17. finger prints processing device according to claim 10, it is characterized in that: when registration mode, when the finger of user is out-of-date from sensor electrode array slip up, described acquisition module obtains and is scanned, by all or part of scanning area on described pressing type fingerprint sensor, multiple fingerprint images obtained.

18. finger prints processing device according to claim 10, it is characterized in that: when registration mode, fingerprint image after processing module screening includes multiple, overlap between fingerprint image adjacent in multiple fingerprint images after described screening, or, have non-overlapping between fingerprint image adjacent in multiple fingerprint images after described screening, or, overlap is had between the fingerprint image that in multiple fingerprint images after described screening, part is adjacent, non-overlapping between the fingerprint image that part is adjacent.

19. a fingerprint recognition system, including:

Pressing type fingerprint sensor, including sensor electrode array, described pressing type fingerprint sensor is used for:

When registration mode, when the finger of user is at the out-of-date execution finger scan of described sensor electrode array slip up, so that described finger prints processing device obtains multiple fingerprint images；And

When Validation Mode, perform finger scan when the finger of user touches or is pressed against on described sensor electrode array, so that described finger prints processing device obtains fingerprint image；With

Finger prints processing device, for the finger prints processing device described in any one in claim 10-18.

20. an electronic equipment, including the fingerprint recognition system described in claim 19.